Reduced graphene oxide-based graphite electrode

Abstract

A modified graphite electrode comprising a coating of electrochemically reduced graphene oxide. The modified graphite electrode may be employed in detecting of uric acid. A sensing device comprising the modified graphite electrode and a method of making the modified graphite electrode are described herein.

The invention claimed is: 
     
       1. A reduced graphene oxide-based graphite electrode, comprising:
 a graphite electrode with an outer surface; and 
 a coating on the outer surface of the graphite electrode, wherein the coating consists of wrinkled layers of electrochemically reduced graphene oxide having hydroxyl groups, and the modified graphite electrode has an electroactive surface area in a range of 0.3-0.6 cm 2 . 
 
     
     
       2. The reduced graphene oxide-based graphite electrode of  claim 1 , wherein the graphite electrode is in the form of a pencil lead. 
     
     
       3. The reduced graphene oxide-based graphite electrode of  claim 1 , wherein a thickness of the coating is in a range of 0.001-5 μm. 
     
     
       4. The reduced graphene oxide-based graphite electrode of  claim 2 , wherein the pencil lead has a diameter in a range of 0.1-1.4 mm, and a length in a range of 20-70 mm. 
     
     
       5. The reduced graphene oxide-based graphite electrode of  claim 4 , wherein the pencil lead is of a grade 6H, HB, B, or 4H.